What is the total number of pots used in this experiment, and how many plants received each soil treatment? Explain why multiple pots and plants were used for each treatment.
Answers
Replicas are repetitions of the basic experiment to get better and more reliable results. 1) 20 pods. 2) 32 plants. 3) By using replicas the researcher gets more representative results, and the experiment is more reliable.
What is a replica in an experiment?When talking about replicas in an experiment, we refer to the repetition of the most simple basic element.
Having several replicas in an experiment let the researcher to get more precise results and obtain a better estimation of the experimental error.
The greater the numer of replicas the researcher includes in the experiment, the better and more precise will be the results.
In the exposed example,
Number of treatments: 5Number of pods per treatment: 4 (which means that 4 pods received the same type of soil).Number of plants per pod: 5 (which means that 20 plants grew in the same type of soil).1) What is the total number of pots used in this experiment?
Twenty pods in total. Four pods per soil treatment (4 x 5 = 20)
2) How many plants received each soil treatment?
Thirty two plants per treatment. Eight plant per pod (8 x 4 = 32)
3) Why multiple pots and plants were used for each treatment?
Because it provides more reliability to the experiment. These are replicas. They let the researcher know if the result at any of the pods was due to other factors or random chances. Using several pods per treatment increases the chances of getting real results. In this way, results are more representative of what really occurs in nature.
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Complete question,
The rhizosphere, the soil layer surrounding plant roots, is a complex community in which archaea, bacteria, fungi, and plants interact with one another.
After plants are attacked by fungal or bacterial pathogens, soil from the rhizosphere may protect plants from future attacks. Such protective soil is called disease-suppressive.
Researchers investigated whether microorganisms were responsible for the protective effects of disease-suppressive soils.
Disease-suppressive soil was obtained from an agricultural field in the Netherlands in which sugar beet crops had previously been attacked by a fungal pathogen, Rhizoctonia solani. Other soil was collected from the margin of the field.The researchers predicted that soil from the margin would not offer protection against pathogens.
The researchers then planted and raised sugar beets in greenhouses, using 5 different soil treatments,
each soil treatment was applied to 4 pots, and each pot contained 8 plants.The pots were inoculated with Rhizoctonia solani and placed in greenhouses kept at 20degree C with a 16-hour light: 8-hour dark cycle.
After 20 days, researchers determined the percentage of infected sugar beet seedlings for each soil treatment.
Related Questions
How are Cyanobacteria different from most bacteria
Answers
Answer:
Cyanobacteria is also known as blue-green algae. They differ from other bacteria as cyanobacteria contain chlorophyll-a, while most bacteria do not contain chlorophyll. Chlorophyll-a is a pigment that gives them their characteristic blue-green color.
Explanation:
hope it helps you
Explain what is meant by the term gaseous exchange. In which organ does it take place?
Answers
Answer:
the body is an organ
Explanation:
organ
An object travels at constant speed, and its distance and time are shown in the graph. What is the average constant speed of the object between 2 and 5 seconds?
Answers
Explanation:
A distance-time graph tells us how far an object has moved with time.
• The steeper the graph, the faster the motion.
• A horizontal line means the object is not changing its position. It is not moving, and it is at rest.
• A downward sloping line means the object is returning to the start.
Use the text and the graphs above to choose all of the correct answers concerning speed?
In both graphs, speed will be measured in meters/second.
In graph A, the object travelled a distance of 40 meters in 4 seconds
The total distance travelled by the object in graph B is greater than the object in graph A.
In graph B, the object is at rest for 5 seconds.
The object in graph B was moving at a greater speed than the object in graph A
Distinguish between a prokaryotic cell and a eukaryotic cell by selecting the accurate statements that apply to eukaryotic cells. Check all that apply. A) Only eukaryotic cells have flagella. B) Only eukaryotic cells have mitochondria. 0 Only eukaryotic cells have a cell membrane. D) Only eukaryotic cells have an endoplasmic reticulum. Only eukaryotic cells have DNA enclosed in a nucleus.
Answers
Answer:
B) Only eukaryotic cells have mitochondria
Only eukaryotic cells have DNA enclosed in a nucleus.
Explanation:
This is because eukaryotic cells are cells that have membrane bound organelles like RIBOSOMES, mitochondria, endoplasmic recticulum, Golgi apparatus e.t.c and they have nucleus. Their DNA are enclosed in a nuclear envelope. They are mostly multicellular cells and their memberane bound nucleus and organelles perform several roles.
8. What is the probability that an Rr organism and an Rr organism will
produce an RR offspring? Mark all that apply.
Answers
Just do a punnet square
What are two things that can make the pressure of a gas rise? (what are two variables you can change to increase the pressure) *
Answers
Answer:
Temperature, pressure, volume and more
35.34
what would most likely be included in the "analysis" section of a lab report?
a discussion of any errors in the experimental data
a list the supplies that were used in conducting the experiment
suggestions for new experiments based on the results
a description of what the dependent and independent variables were
Answers
The data that was gathered from the specific experiment is described in the analysis section of a lab report. A explanation of the dependant and independent variables is the right response. Hence option (d) is correct.
Writing down the important aspects of the experiment and the analysis of the experimental data is the goal. The analysis section of a lab report is often made up of a critical evaluation of the information and findings from the tests and experiments conducted in the lab. It is intended to include every positive and negative aspect of the trial.
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what would most likely be included in the "analysis" section of a lab report?
a. a discussion of any errors in the experimental data.
b. a list the supplies that were used in conducting the experiment.
c. suggestions for new experiments based on the results.
d. a description of what the dependent and independent variables were analaysed.
an ecological pyramid is a represnetion of the distribuiton of organim in an ecosystme based on their trophic levle. what level has the greatet nubmer of organism and the greatest biomass in terrestrial ecosystems and most aquatic ecosystems
Answers
Description. An energy pyramid, also known as a trophic or ecological pyramid, is a graphical depiction of the energy found within the trophic layers of an ecosystem.
The bottom and greatest level of the pyramid is the producers and contains the highest quantity of energy.
A biomass pyramid is the depiction of total live biomass or organic matter present at different trophic levels in an ecosystem.
Biomass is estimated as the mass of live creatures present at each trophic level in a given sample size. Calories per unit area or dry weight in grams are two ways to see it.
graphical illustration of an ecological pyramid, also known as a trophic pyramid, Estonian pyramid, energy pyramid, or occasionally a food pyramid, is used to illustrate the biomass or bio-productivity at each trophic level in a particular ecosystem
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The weak chemical bonds important in holding the DNA double helix together is the? A. Ionic bond, B. Polar covalent, C. Nonpolar covalent, D. Hydrogen bond
Answers
The weak chemical bonds important in holding the DNA double helix together are the hydrogen bonds.The correct option is D.
To explain further, the DNA double helix consists of two complementary strands of nucleotides, which are held together by weak chemical bonds known as hydrogen bonds.
These bonds form between the nitrogenous bases of the two strands, specifically between adenine (A) and thymine (T) and between guanine (G) and cytosine (C). Hydrogen bonds are not as strong as ionic bonds (A) or covalent bonds, which can be polar covalent (B) or nonpolar covalent (C), but they provide enough stability to maintain the structure of the DNA double helix while still allowing for the strands to separate during replication and transcription processes.
In summary, hydrogen bonds (D) are the weak chemical bonds that play a crucial role in holding the DNA double helix together.
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What 2 cats cannot compete for food against the python?
Answers
Answer:
look up that title to a video an youll figure it out
Explanation:
"CAT vs PYTHON | Mother Cat Cleverly Bite Giant Python To Protect Her Kittens'
What is the purpose of a Punnett square?
Answers
Answer:
The diagram is used by biologists to determine the probability of an offspring having a particular genotype.
Explanation:
It is named after Reginald C. Punnett, who devised the approach in 1905.
For diffusion to occur, which condition must be met?
A concentration gradient must exist.
A hypotonic external environment must exist.
A hypertonic external environment must exist.
Dynamic equilibrium must exist.
Answers
Answer:
A concentration gradient must exist.
Explanation:
For diffusion to occur, a concentration gradient must exist. Therefore, the correct option is A.
The movement of molecules along a concentration gradient is known as diffusion. It is a significant process that all living things go through. Diffusion facilitates the flow of materials into and out of cells.
Without the use of energy, molecules can be transported from an area of high concentration to an area of low concentration through the process of diffusion. Simple diffusion and Complex diffusion are the two types of diffusion. Diffusion was made easier.
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the notochord and hollow nerve cord are surrounded by which germ layer or cell type? hint: the cord is hollow.
Answers
A hollow cord that is dorsal to the notochord is known as the dorsal hollow nerve cord. A section of the ectoderm that rolls into a hollow tube creates it.
The notochord, the dorsal hollow nerve cord, the pharyngeal slits, and the tail are the four distinguishing characteristics of animals in the phylum Chordata. It provides skeletal support over the entire length of the body and is situated between the nerve cord and the digestive tract. In general, the ectoderm differentiates to produce neurologic (brain, spinal cord, and peripheral nerves) and epithelial tissues. At around 16 days, the axial mesoderm gives rise to the notochord, which is fully formed by the start of the fourth week.
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PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!
Precipitation that gathers into rivers and lakes, and flows down to lakes and oceans describe the ___________ process in the water cycle.
condensation
glacier
evaporation
runoff
Answers
Answer:
I think it's D. Runoff
Water is pumped from a well and used to irrigate a piece of land. What kind of change is this?
A change in a population
.A change in a community
A change in a biotic factor
A change in an abiotic factor
Answers
Answer:
D
Explanation:
which of the following tissue leukocytes will most likely initiate an inflammatory reaction in response to presence of a pathogen but no tissue injury? group of answer choices mast cells macrophages basophils neutrophils
Answers
Option 4 is Correct. When a pathogen is present but there is no tissue damage, neutrophils, the leukocytes that follow, will most likely start an inflammatory response.
The body's first line of defense is made up of neutrophils, which make up 50% to 70% of circulating leukocytes. They take part in the phagocytosis—the process by which germs are removed—and the initial inflammatory response to bacterial infection. They are also the cells that are present in the greatest number near the site of an injury or illness.
The inflammatory reaction (inflammation) happens when bacteria, trauma, toxins, heat, or any other cause damages tissues. Histamine, bradykinin, and prostaglandins are among the substances released by injured cells. These substances lead to blood vessels leaking fluid into the tissues, which results in edema.
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Correct Question:
Which of the following tissue leukocytes will most likely initiate an inflammatory reaction in response to presence of a pathogen but no tissue injury? group of answer choices
1. mast cells
2. macrophages
3. basophils
4. neutrophils
Using evidence from the text, describe the purpose of the cell membrane.
Answers
Answer:
Heyz therez
The cell membrane moderates what comes in and out of a cell, it is vital for the homiostais of the cell. It also keeps it together so all the organelles don't just sail away. ⛵
Answer:
Cell membranes protect and organize cells.
Which tissues are in both leaves and roots? (Select all that apply.)
xylem
phloem
stomata
pistil
Answers
it’s xylem i’m pretty sure :)
Answer:
the answer is phloem and xylem
Explanation:
they are both in the leave and the roots.
Explain how RNA molecules might have been able to respond to natural selection
Answers
RNA molecules can respond to natural selection through a process known as RNA evolution or RNA selection. While RNA molecules are generally considered to be intermediary molecules between DNA and proteins, they can also exhibit certain properties that allow them to be subject to natural selection.
RNA molecules possess structural and functional diversity, allowing them to perform various tasks within cells. This diversity arises due to the ability of RNA molecules to fold into specific three-dimensional structures and exhibit enzymatic activities. Here are a few ways in which RNA molecules can respond to natural selection:
1. Variation: Random mutations can occur during RNA replication, leading to the production of different RNA sequences. These mutations can alter the structure and function of the RNA molecule, potentially providing advantages or disadvantages in specific environments or cellular processes. RNA sequences that confer a functional advantage, such as improved catalytic activity or enhanced stability, are more likely to be replicated and transmitted to subsequent generations.
2. Replication and Inheritance: RNA molecules can self-replicate through processes like RNA replication or RNA transcription. When an RNA molecule replicates, it can produce multiple copies of itself, and these copies can be subject to subsequent rounds of replication. Mutations occurring during replication can generate variation, and different RNA variants can compete for resources or perform different functions. RNA molecules that possess traits advantageous for replication and transmission are more likely to persist and be inherited by future generations.
3. Selection Pressure: Environmental conditions and selective pressures can influence the survival and replication of RNA molecules. For example, certain RNA molecules may be more stable or efficient in specific environments or under particular conditions. RNA molecules that are better adapted to their surroundings have a higher likelihood of survival, replication, and transmission. Over time, this natural selection process can lead to the accumulation of beneficial traits and the proliferation of RNA variants that are well-suited to their environment.
4. Functional Adaptation: RNA molecules can fold into complex structures and exhibit enzymatic activities, allowing them to perform diverse functions within cells. These functions can include catalysis, regulation of gene expression, and even involvement in the synthesis of proteins. RNA molecules that perform these functions more effectively or efficiently are more likely to contribute to the survival and reproduction of the organism. Thus, RNA molecules with advantageous functional properties have a higher chance of being selected and propagated.
RNA molecules can respond to natural selection through the interplay of variation, replication, inheritance, selection pressure, and functional adaptation. This process allows RNA molecules to evolve and adapt to changing environments over time, contributing to the overall diversity and complexity of life.
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RNA molecules might have been able to respond to natural selection through their ability to store genetic information, self-replicate, and catalyze chemical reactions essential for life.
Natural selection is a process where organisms with advantageous traits are more likely to survive and reproduce, passing on these traits to the next generation. RNA, or ribonucleic acid, has characteristics that would allow it to participate in this process. RNA can store genetic information, similar to DNA, and this information can be transmitted from one generation to the next.
Additionally, RNA molecules can self-replicate, meaning they can make copies of themselves without the need for external enzymes or machinery. This is crucial for the process of natural selection, as replication allows for the propagation of advantageous traits. Furthermore, RNA can also act as a catalyst, speeding up essential chemical reactions within a cell. These catalytic RNA molecules, called ribozymes, would have been subject to natural selection, as those with more efficient catalytic properties would have had a higher probability of survival and replication.
Overall, RNA's unique properties enable it to respond to natural selection, potentially playing a significant role in the early stages of life's evolution.
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which of the following abbreviations stands for the name of a chamber of the heart?
a) BP
b) EKG
c) RA
d) PCP
Answers
The abbreviation that stands for the name of a chamber of the heart is c) RA, which stands for Right Atrium.
The heart is composed of four chambers: the right atrium (RA), right ventricle (RV), left atrium (LA), and left ventricle (LV). The right atrium is responsible for receiving deoxygenated blood returning from the body. It receives this blood through two main veins: the superior vena cava, and pumping it to the right ventricle. The abbreviation RA specifically refers to the right atrium, one of the chambers of the heart. The other options, BP (blood pressure), EKG (electrocardiogram), and PCP (primary care physician), do not represent specific chambers of the heart but rather refer to other medical terms or healthcare professionals.
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How does continental drift theory explain extinction of organisms?
Answers
Answer:
He argues that the “dance of continents”-the break-up, movement, collision and re-formation of continents through time-creates the basic geographic and climatic conditions which drive the decline and extinction of species.
Explanation:
PLEASE ANSWER ASAP!!!!!!!! ITS DUE IN 5 MINUTES.
1.) How do organisms benefit from Mitosis? Write a paragraph using at least five sentences.
Answers
Answer:
Organisms benefit from mitosis because mitosis helps regenerate cells. This helps them recover from injuries and more.
Explanation:
Although you may not actually do a laboratory activity, from your readings and
knowledge base, you can attempt to form EXPECTED RESULTS. Read Investigation 5.A. Analysis 1.
a. What would you expect to happen to the glowing wooden splint inserted
into the test tube with gas from the Cobomba plant? Why? 2 marks
b. Explain the source of the gas. 1 mark
Answers
The splint will burst into flame would be expected to happen to the glowing wooden splint inserted into the test tube with gas from the Cobomba plant.
When exposed to sufficient light, the pond weed Cobomba will start to create bubbles of oxygen-containing gas when submerged in a solution of sodium hydrogen carbonate.
Gas is created when layers of rotting plants and animals are exposed to extremely high temperatures from the Earth and pressure from rocks. The natural material was transformed into coal, petroleum, and natural gas by all this pressure, heat, and time over millions of years.
In the electrolytic breakdown of water, oxygen, and hydrogen build up on the anode and cathode, respectively. To check for each, use a wooden splint.
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Dwarfism in pea plants is caused by a single gene. Tall is a dominant trait and dwarf is a recessive trait. If two dwarf pea plants were crossed, their offspring will be?.
Answers
Tall is a dominant trait and dwarf is a recessive trait. If two dwarf pea plants were crossed, their offspring will be dwarf because there in no dominant gene to mask the dwarfism since both parents are homozygous recessive.
Short stature caused by a genetic or medical disease is known as dwarfism. A height of 4 feet 10 inches (147 cm) or less in adulthood is considered dwarfism. Individuals with dwarfism are typically 4 feet tall as adults (122 cm). Dwarfism is brought on by a variety of medical disorders. The term "homozygous recessive" refers to an organism that possesses two identical copies of the recessive gene. Learn more about the meaning of homozygous recessive and examples of genetic illnesses caused by this gene.
Recessive alleles, also known as homozygous alleles, only manifest their effects in individuals who have two copies of the allele.
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After running, Ollie’s blood pressure was high. His nervous system sensed this and sent a message to decrease heart rate and blood flow.
Which system worked together with the nervous system?
skeletal system
circulatory system
respiratory system
digestive system
Answers
Answer:
circulatory system
Explanation:
How would a disease that infects and kills Jerboa most directly affect the given
food web above?
Answers
12Select the correct answer.Which statement about ecosystems is true?OA Ecosystems are always a few square meters at most.OB. Ecosystems are exactly one square kilometer.OC Ecosystems are always larger than a blome.OD. Ecosystems are always smaller than a blome.ResetNext
Answers
Remember that a biome is the set of ecosystems of a biogeographic zone. Thus, the biomes are areas that have similar climates, plant and animal populations, and share geographic conditions. Now, an ecosystem consists of all the biotic and abiotic factors in an area and their interactions. Thus, ecosystems can vary in size and that means ecosystems can be very tiny or very large.
This means that the correct answer is:
Answer:D. Ecosystems are always smaller than a biome.
Transpiration is regulated by the movements of
a. Parenchyma cells
b. Guard cells
c. Epithelial cells
d. None of the above
Answers
Answer:
B
Explanation:
Because transpiration is the evaporation of water from plants and guard cells also stress tolerance
mechanism in plants.
Use the drop down menus to match the structure to its definition.
✔ tonsils
Two oval shaped tissues at the back of the throat that prevent infection by trapping pathogens that enter the nose and the mouth.
✔ spleen
An organ near the stomach that filters blood, stores red blood cells, destroys old red blood cells, and contains lymphocytes.
✔ adenoids
Spongy tissues at the back of the nasal cavity that prevent infection by trapping pathogens that enter through the nose.
Answers
Answer:
That is correct?
Explanation:
Pls fill in the blank. Ty
Answers
